Agricultural machine



March 17," 193i'. J. s. STEWARTV 1,795,311

AGRICULTURALl MACHINE Filed Aug- 25. 192'? 2 Sheets-Sheet l lNvENToR ATTORNEY uial'ch 17, 1931. 1 s STEWART 1,796,311

AGRICULTURAL MACHINE Filed Aug. 25, 1927 2 Sheets-Sheet 2 ATTORNEY Patented Mar. 17, 1931 TENT OFFICE JAMES S. STEWART, F REDLANDS, CALIFORNIA, ASSIGNOR, .'BY MESNE ASSIGrNvIENTS, TO GEORGE VOSS, OF SAN BERNARDINO, CALFORNIA AGRICULTURAL MACHENE Application filed August 25, 1927. Serial No. 215,424.

This invention'relates to improvements in agricultural machines generally, and more particularly to disc gang harrows.

The principal object of the invention is to provide a two gang tractor harrow of the oiiset or orchard type, and one wherein the several discs making up a gang are mounted in a manner tobe simultaneously adjusted to various angular cutting positions without 1u effecting an angular adjustment of the gang frame for the purpose.

Another object of the invention is to provide a two gang type of disc harrow as hereinbefore characterized, wherein the several discs are provided with individual mountings of a simple but efficient construction and arrangement, whereby the repair or replacement of the one disc and mounting unit is facilitated without interference with or by 2G the other of such units.

A further object of the invention is the provision of a simple but effective means for adjusting the angular cutting positions of the several discs of a gang simultaneously and with uniformity one with respect to the other, and from a point convenient to the position of the operator on a tractor located in offset relation to theharrow.

Another object of the invention is the adaptability of the adjusting means aforesaid to effect the simultaneous angular adjustment of the discs of two or more gangs from the normal position of the operator.

A still further obj ect of the invention is the provision of a means whereby the vertical angle of the several discs of a gang harrow may be altered correspondingly for the effective cutting operations of the discsin soil of different degrees of hardness.

With the foregoing and other equally important objects and advantages in view, the invention resides in the certain new and useful combinations, constructions and arrange- 5 ments of parts as will be hereinafter more fully described, set forth in the appended claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a top plan View of a preferred embodiment of the invention,

Vof substantially rectangular form anel consist- Figure 2 is a vertical longitudinal section taken on the line 2 2 of Figure 1,

Figure 3 is an enlarged fragmentary elevation, partly in section, showing one of the disc harrow blades and its independent mounting, Y

Figure 4 is a perspective view of one of the cross members or trusses of a gang frame for supporting a disc blade and its mounting,

Figure 5 is a top plan view similar to that of Figure 1, but showing a modified form of means for edecting the angular cutting positions of the several disc blades, and

Figure 6 is a fragmentary front elevation of the disc gang frame showing the modified form of operating device for the adjusting means.

Referring to the drawings, wherein similar characters of reference designate corresponding parts throughout the several corelated views thereof, and more particularly to Figures 1 to 4l inclusive, the preferred embodiment of the invention as shown therein comprises a pair of disc barrow frames each ing of a front member or bar 10 and a rear member or bar 11, and a plurality of cross members or trusses extending between and connecting the same at their opposite ends and in equidistantly spaced relation. These cross members or trusses each comprise a lower member or bar having a short horizontal portion 12, ap-ertured as at13, disposed medially between oppositely and upwardly inclined portions 14, which have their free ends angularly bent to provide Securing iianges 15 and 15 disposed in abutting rela-- tion to the inner sides of the front and rear frame members or bars 10 and 11 for attachment thereto. These flanges 15 and l5 are apertured, as at 16, for the passage through the same of securing bolts 17 engaged in complemental apertures formed in the members or bars 10 and 11 for the purpose. It is to be noted that the flange portion 15 is of a slightly greater length than that of the flange portion 15, and is provided with two of the apertures 16 arranged one above the other. An upper member or bar having a horizontal portion 18, apertured, as at 19, disposed medially between oppositely and downwardly inclined portions 2O is supported on the upper side of the lower member or bar by means or" angularly bent fiange poi-tions 2l being' formed at the free ends of the inclined portion 20, and seated on the inclined portions 14 or' the lower member or ba at points thereon equidistantly spaced inwarc ly from the upturned flange portions l5 and l5 oi the latter. These iiange portions 2l are preferably secured to the portion 14 by means of bolts rEhe invention contemplates the provision of a number of disc units correspondingto the number ot cross bars or trusses disposed between the iront and rear frame members or bars lO and ll, and each ot tisse units comprises a disc blade 8 mounted for rotation on a spindle Ql. which entends horizontally from a cylindrical bearing' portion 25. rlhis bearing` portion 25 is positioned vertically between the Liver and upper horizontal portions l2 and 1S of the lower and upper portions of the cross bars or trusses of the frame.y a id has a through the same concentric bore extendi wlieh is disposed in ali ijnnient with the apertures l and i9 ol the horizontal portions l2 and lf3 for the insertion therethrough of a pivot bolt or the like 26" by which arrangement the several disc blades L23 are disposednin ali inent substantially in the glane of the l tudinal center of the frame. For the purpose of electing an angular adgustinent of the disc blz des 23, the bearing portion ot the spindles each have conto one si e oi2 ihe saine one end oi" a vr arm 27. which inclines upwardly from its point of connection with the bearing 25. The levers or arms 27 or the front or leading frame extend in a reaii'ward direction and have their free ends disposed in the plane of' the rear Jframe member or bar il. and above the e, while those o the or trailing; sans traine extend in a forward d' etion and have "heir free ends i of and above V r lO ott this For tlie simultaneous adjustall et the disc blades 23 o` a gang Le ,eine3 the tree ends of t e levers or arn's are pivotally connected3 as at 28, to an t 3' member or bar 2l), which,

in either direction longitudinally oi' a gang irame force the levers or arms 27 corresponding direction to impart a 7 to the bearings 25 with t that the spindles 2li are swung in a horiz/zentral plaie anfl aiigularly to one side or the other oi" the longitudinal center of the gang? frame and t, e )lades 23 to similar angular positie i espect to the transverse center oi e 1 The disc blades E23 may also be .idiusted angularly in a vertical fjlirectien by rocking the cross members lvirv: "F 4:1. pn am w i t1 i b lt or Li kses oi LVLie naines on ic oL s l? employed 'for securing the opposite ends and rear frame To admit ol this roel;- the trufses, a; required a movement is provided he arms 2"' and the ci .saine to ihe operatis Aclearly shown in of the saine t( ilie fron members l and ll noieineiit s are to be t instance, 'ated in both ot the ,cting this couplingi` ether, o ic in :ear ot i' onfl i i une" i n i t .c7 the saule vill be disposed in slightr i y at the disc blades 23 gang will operate in paths :l of the leading disc blades,

so that the soil will be mor thoroughl and ofniditioned in the lorwar( The couplingjf; oli the ier is to be accon'iplislied 'ed manner, or by boltt a pair ot 1 m roth aange.

Jaces of the front and bars l0 and l1 oli the i geinig lrames respectively, 'gore 2. lVh-en the fangs are ibled and coupled together, the

i ot the leading;A gang will be dispoe ward dii'ectioin while thos o" th 7 p gg; ng will be disposed in iorvard on,'substantially as shown. ln this poitio'i, trie operating members or s Lh sets of levers or arms 2f) ,arallcl elation correlation ot the adrear gang in ie parallel the iront and frames. To eTe-ct the simultaneous angular adjustment el' the disc blades of' both ei'ating members 0r bars 29 a diagonwhich is 32, to the s e leading' gang; ,nim immediately inward of one end th oi.y and a second member or bar (i3 proje"tin;r from the same sioe of the leadirg gang; iframe inwardly of the opposite end oi' the saine7 and Viztending therefrom n a diL l directi n. rlie forward ends of these draft traine members G2 and 63 are connected to the coupling member Gl by suitable lastenings such as bolts 0r the like 64.

As shown in Figures l and 2, the disc blades 23 are to be adjusted as desired through the medium of an arm or lever 35, which has one end secured to the pivot bolt 25 of the bearing portion 24 of one of the intermediate disc blades 23 of the leading gang frame, and its other end pivotally connecting, as at 36, one' end of a shorter arm or lever 37 disposed in angular relation to the arm or lever 35. This pivot bolt 23, as shown in Figure 2, is connected to the associated bearing portion 24 by means of a cotter pin or the like 26, whereby the tui .ing movement of the bolt 26, under the action of the arm or lever 35, is transmit ted to the bearing portion 24, and through its arm 27 to the longitudinal member or bar 29 through which similar turning movement is imparted to all of the several disc blades 23 of the leading gang frame. This endwise movement of the member or bar 29 is transmitted to the longitudinal member or bar 28 connecting the lever arms 27 of the disc blades 23 of the rear or trailing gang frame, and in a manner that the latter disc blades 23 are simultaneously turned to an angular position corresponding to that assumed by the disc blades of the leading gang, substantially as shown in dotted lines in Figure l. ylhe opposite end of the shorter arm or lever 37 is, in turn, pivotally connected, as at 38, to the free end of an arm 39 projecting radially from a worm wheel 40, which is keyed to a shaft 4l journalled vertically in a suitable bearing 42 at the outer end of a substantially V -shaped frame formed by the members or bars 43 and 43 secured in horizontal position at the forward side of th-e front member or bar l0, of the leading gang frame. The worm Wheel 4() is arranged in mesh with a worm 44 formed at the rear end of a shaft section 45, which has its forward end telescopically engaged in a socket opening through the rearwardly directed end of a shaft section 46. The worm shaft 45 is journalled at a point immediately adjacent the worm 44 in a bracket 47 secured in position on the frame member 43', while the for ward end of the shaft section 46 is journalled in a suitable bearing 48 secured at the upper side of the coupling member 3l at the forward end of the draft frame. The extreme forward end of the shaft section 46 is projected through the bearing 48 sufliciently to have secured thereon a hand Wheel 49, by means of which motion is imparted to the cooperative parts for the angular adjustment of the several disc blades 23 of each of the gangs.

In Fgures 5 and 6, a modified form of actuatin g mechanism is shown for effecting the angular adjustment of the arm or lever 35, and in this instance, its free end is pivotally engaged, as at 50, to one end of an operating rod 51, which extends to one side of the forward side of the leading gang frame and pivotally connects a hand lever 52 at its opposite end. This hand lever 52 is pivoted at its lower end, as at 53, to the front member or bar of the leadinggang frame for the proper swinging movements to edect the desired angular adjustments of the disc blades 23. Mounted on the front member or bar l0 of the leading gang frame is a rack 54, of semi-circular or segment form, with the toothed periphery of which, a pawl carried by the hand lever 52, is cooperative. This pawl or dctent 55 is mounted for slidin movement in bracket 56, secured on one of the hand lever 52, and is normally urged into engagement with the teeth of the rack by coiled spring 57. rlhe pawl or detent 55 is operated from a hand grip 58 pivted, as at 59, adjacent the free end of the hand lever 52, and through the medium of a rod 60 connecting an angular extension formed at the pivoted end of the hand grip 58 at one of its ends, and the free end of the pawl or 'det-ent 55 at its other end.

in this latter instance, the disc blades 23 will bc moved from normal positions to various angularly disposed positions of operation by the proper manipulation of the hand lever 52, in one direction of movement of the same, and secured inany desired position by the engagement of the pawl 55 with the teeth of the rack member 54. By releasing the pawl 55 from the rackmember 54, the hand lever 52 will be moved in the opposite direction to return the disc blades 23 to normal position, when the pawl 52 will be released for engagement with the rack member 54 to secure the parts in such position.

lVithout further description, it is tnought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the form, proportion and minor details of construction r ay be resorted to, without departing from the spirit of the invention or its scope as claimed.

Having thus fully described the invention, what is claimed is: j

l. In a machine of the class described, a leading gang frame, a trailing gang frame, a plurality of disc blades carried by each of said frames, independent mountings for each of said disc blades, said mountings beingadjustable to vary the vertical working angle of said disc blades. a draft frame carried at the forward side of said leading gang frame, and means operable from said draftframe for adjusting said mountings on both of said gang frames simultaneously to vary the horizontal working position of said disc blades.

2. A disk harrow comprising an oblong frame, a series of disk supports tiltably mounted in spaced relation longitudinally of the frame, a disk carrying shalt having an upright bearing ournaled in each support, a crank-arm fixed on each bearing, and means pivotally connecting said crank arms for lio 'oint movement at any tilted position of the islt supports.

risk narrow coingrising an oblongv fading parallel frame members, a connedting` said menu C there t "foal shaft on each supatts haif'ingr uprie t carrying; sli p sleeves :uiinile l on saio sliats, and niet` is `for simultaneously turning all said sleeves :mj: ti" ed no ion of the supports.

' t harron' compris? in combinaanu, rear horizontally disposed ,t l unes., each includ ,q iront an d rear li r' l' on its longer dimension, a df'fA i ne conn ected to the front 1oar of the 't Jmost et said trames a hitch piece cariied by said dr: 'it trame towards one lateral end oit trames, one oit said oblong; frames l eine; par ',ially oitset to one side oit the outer i thereofn a series oit' horizontal disk carrying' shafts hief'ing separate Vertical pivot gortions connecting each shatt to the trame, means corneeting` said pivotportions for joint angular movement, and means tor effecting said angular movement including an actuatino element located adjacent the hitch piece ov; the dratt frame.

A dish barrow comprising, in. combination, front and rear horizontallyY disposed transif'ersel)7 elongated frames, means for connecting said frames in fixed partially7 oilset parallel relation. a series of hearing; mem hers mounted on each of said frames in equallr spaced relation on the longitudinal mediaA lines thereof. the disks on one trame heine` offset to substantially7 centered position with respect to the dislts on the other frame. disk carrying shafts having; upright positions iournalled in the bearing members, a draft traine at the fimt of the leading' ,traine and offset toward that end of the same opposite to the direction ot offset or" the trailing trame, and means for simultaneously turning; the said shafts to angle the dislts, said means incliuliirf;` an actuating; device located on the draft ltrame.

G. A dislt harroW comprising the Combination of iront and rear horizontally disposed oblong trames, means for connecting' said in tired parallel. relation, a series of hearing members mounted on the respective f'ames at relatireliT offset points disposed in ed Ilv spaced relation on the longitudinal me n lines ot the trames, disk carin-,fing

draft :trame and power transmitting means between said element and the links.

7. A disk harrow comprising, in combinaltion, front and rear horizontally disposed transrerseliY elongated frames, means for connecting' said iframes in fixed partially otlset parallel relation, a series oi' hearing" incn'iliers mounted on each of said trames in equally spaced relation on the longitudinal median lines thereof, the disks on one trame being offset to substantially centered position with respect to the disks on the other trame, disk carrying shafts having upright positions iournalled in the hearing members, a draft frame at the front of the leading trame and offset toward that end or" the same opposite to the direction of oii'set oi the trailing*Y frame, and means for simultaneously turning` the said shafts to angle the disks, one series of the same in a direction reversed to the other, said moans incluoing' an actuating device located on the draft frame. 

